Furnace-door-opening device



Mu i nargays un. esmas; Patented nec. |7, mou.

v v A. HAZELTON. v

FURNCE 000K DPENING DEVICE. (Anuman man3. 94, 1901.) (In lndsl.)

ri l so V v Y L f 30 /0 I o /5 *.K y7 Ili /f /Z n# 0 -21;.- s 90 a /9 Y2f f /Z TLW: ,3. a 7

LL /6 z 4 3 Y 2/ Vdhpsus l j ave/ 70714. 190291.

l `UNITED STATES PATENT OFFICE;

ASA IIAZELTON, OF VANDALIA, MISSOURI, ASSIGNOR OF ONE-HALF TO WILLIAMBOYD, VANDALIA, MISSOURI;

'FuRNAcE-DooR-OPENING DevlcE.

SPCIFICATIN forming part of Letters Patent No. 689,185, dated December17, 1901;

` llpplifmtiojl led January 24, 1901. Seriell No. 44,583. (No model.)

To a/ZZ whom, zl may concern:

Be it known thatI, ASA HAzELToN, a citizen of theUnited States, residingat Vandalia, in the county of Audrain and State of Missouri, haveinvented a new-and useful Furnace-Door0pening Device, of which thefollowing is a specification. Y

This invention relates to furnace-door-operating devices; and it has forits object to provide a construction wherein by depression of afoot-lever the furnaced0or will be raised bodily at the same time thatit is rotated, so that the latch carried by the door will be lifted fromthe keeper on the furnace t0 permit of rotation of the'door to its open'position.

A further object of the invention is to provide a construction with aminimum of parts for accomplishing this purpose, vfurther ohjects andadvantages of the invention being evident from the followingdescription.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in both views, Figure1 is a perspective view showing a portion of ,a locomotive boiler andcab and illustrating the application of the invention to thefurnace-door. Fig. 2v is a vertical sectional view taken through thefloor of the cab, parts of the mechanism being shown in elevation andthe furnace-door being illustrated as open.

Referring now to the drawings, 5 represents the rear end portion of alocomotiveboiler, and 6 a portion of the iioor of the locomotive-cab.The furnace of the boiler has the usual doorway for feeding fuel, andthis doorway has a door 7, provided with a pivoted latch 8, which whenlowered engages a keeper 9 on the end of the boiler. The door 7isprovided with two hinge elements 10 and 11 in the form of eyes,andengaged with these eyes is a vertical pintle 12, the upper end of whichis rotatably mounted in an eye 13, which is secured to and projectsrearwardly from the end of the boiler. The pintle below its connectionwith the door is passed through an eye in a block 14, which is securedto the end of the boiler, preferably adjacent to the floor of the cab,and the pintle is continued downwardly to a point below the floor of thecab, as illustrated in the drawings. The door is held rigidlyto thepintle through the medium of set-screws 15, as illustrated, so that whenthe pintle is raised to slide through its bearings the door will belikewise raised and the latch Swill be lifted therewith from the keeper.When the door is lifted to disengage the latchl` the pintle is rotatedto swing the door open.

To lift the pintle 12, a lever' 16 is suspended from the under side ofthe cab-floor by means of links'lS, and at one end of this lever ispivoted a plunger 19, which is passed upwardly through the fioor of thecab and is provided at its upper end with a footpiece 20, which whendepressed acts to move the lever pivotally and raise its Aopposite end.This opposite end of the lever 16 is provided with a head comprising abifurcated block 21, which receives the end of the lever proper in itsslot and which lever is held in the slot by bolts or otherwise. `In theupper face of the head is a recess 22, against the bottom of whichrestsa ball 23, and against the upper face of this ball rests the lowerrounded end of the pintle 12, so that the pintle may turn freely andwith little friction.` To hold the pintle against 'movement from thecontact with the ball, a groove 24 is formed in the pintle on a linewith the upper face of the head of the lever, and in this groove areengaged the edges of arcuate slots in plates 25 and 26, which arebol-ted or otherwise secured to the upper face of the head.

When the pintle 12 is raised, it must be turned to swing the door open,and for this purpose a helical groove 28 is formed in the pintle, and inthis groove is engaged a screw 29, which is engaged with the block 14E,and when the pintle is raisedthe side wall of the groove presses againstthe screw with a wedging action, andas a result the pintle is rocommonopening-chain 30, attached at one end to .the door-latch and at theopposite-end to the boiler or other convenient support.

- disengagement by upward movement of the door, means for raising thedoor, and cam connections with the door operable by upward movement ofthe door for moving the door pivotally. g

2. The combination with a door having a pivoted pintle to which the dooris rigidly connected, of a latch mechanism for thedoor adapted fordisengagement by upward move-V ment of the door, said pintle having ahelical groove progressing longitudinally thereof, means for raising thepintle to raise the door, and means engaged vwith the groove for contactwith the sides thereof to swing the pintle and therewith the door as thepintle is raised and lowered.

3. The combination with a door having a pintle fixed thereto andprovided with a helical slot progressing longitudinally of the pind tle,of a. latch mechanism for the door comprising a fixedlkeeper and a latchpivoted to the door for movement into and out of engagement with thekeeper independently of the door, and for movement also with the i doorinto and yout of engagement with the keeper, means for raising thepintle to raise the door to disengage the latch from the keeper, andmeans engaged with said slotfor contact with the sides thereof to movethe .pintle rotatably as it is raised and lowered.

4..'1he combination with a door having latch mechanism adapted fordisengagement by upward movement of the door, of a pintle fixed to thedoor and having a helical groove progressing longitudinally thereof,means engaged with the slot for contact with the sides .thereof torotate the pintle as it is raised and lowered, and a foot-lever forraising the pintle. t t y In testimony that I claim the foregoing as myown I have hereto affixed my signature in the presence of two witnesses.L

Y ASA I-IAZELTON. Witnesses: v e

S. E. KENDALL, V. L. BESHEARS.

